SEGMENT REPORTING (Reconciliation of Income Before Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Economic net income
Income (loss) before taxes	$ 241,097	$ 84,383	$ (55,316)	$ 220,343
Adjustments:
Equity compensation expense	28,683	24,029	61,240	51,581
Consolidated Funds
Adjustments:
(Income) loss before taxes of non-controlling interests in Consolidated Funds, net of eliminations	85,186	8,346	(81,220)	25,970
Total investment income - realized	(116,314)	(102,206)	(229,539)	(195,390)
Operating segment
Economic net income
Income (loss) before taxes	241,097	84,383	(55,316)	220,343
Adjustments:
Depreciation and amortization expense	6,319	5,221	11,861	11,045
Equity compensation expense	28,683	24,029	61,240	51,581
Transaction support expense	3,188	4,207	6,325	5,980
Deferred placement fees	10,320	12,432	15,735	12,953
Other expense, net	0	2	0	1
Total performance (income) loss-unrealized	(257,303)	(98,662)	130,354	(245,237)
Total performance related compensation - unrealized	200,064	67,459	(85,828)	174,762
Total investment (income) loss-unrealized	(27,683)	2,990	72,950	(8,215)
Realized income	168,637	148,595	367,020	306,901
Total performance income - realized	(44,625)	(35,994)	(196,395)	(104,567)
Total performance related compensation - realized	37,044	25,229	155,037	74,446
Total investment income - realized	(11,107)	(6,940)	(24,878)	(21,325)
Fee related earnings	149,949	130,890	300,784	255,455
Operating segment \| Consolidated Funds
Adjustments:
(Income) loss before taxes of non-controlling interests in Consolidated Funds, net of eliminations	(85,188)	(8,079)	81,190	(25,124)
OMG
Adjustments:
OMG expense, net	52,890	53,680	111,762	107,003
Realized income	53,389	54,284	117,627	107,958
Total performance income - realized	0	0	0	0
Total performance related compensation - realized	0	0	0	0
Total investment income - realized	397	416	6,904	797
Fee related earnings	(52,992)	(53,868)	(110,723)	(107,161)
Subsidiaries \| Operating segment
Adjustments:
(Income) loss before taxes of non-controlling interests in Consolidated Funds, net of eliminations	$ (3,750)	$ 933	$ 16,747	$ 1,809

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